【摘要】：本文利用大型結(jié)構(gòu)分析軟件Midas/Civil對(duì)非對(duì)稱高墩大跨連續(xù)剛構(gòu)橋建立有限元模型，并對(duì)結(jié)構(gòu)的地震反應(yīng)做了一些研究。本人主要研究?jī)?nèi)容如下： ①利用Midas/Civil對(duì)高墩大跨連續(xù)剛構(gòu)橋梁建立有限元模型，進(jìn)行特征值分析，得出它的自振頻率與周期，以及振型，并分析其自振特點(diǎn)。 ②在不同地震荷載工況作用下，采用反應(yīng)譜法和時(shí)程分析法對(duì)結(jié)構(gòu)的地震反應(yīng)進(jìn)行分析；結(jié)構(gòu)在相同荷載工況作用下，對(duì)橋梁關(guān)鍵截面反應(yīng)譜法分析結(jié)果與時(shí)程分析法的結(jié)果進(jìn)行了對(duì)比，，并得出結(jié)構(gòu)在抗震設(shè)計(jì)時(shí)應(yīng)如何有效的選取抗震計(jì)算方法。 ③建立四種不同橋墩高度的模型，采用反應(yīng)譜法對(duì)結(jié)構(gòu)在不同荷載工況的地震反應(yīng)進(jìn)行分析，通過(guò)關(guān)鍵截面的內(nèi)力值，研究?jī)?nèi)力分布的規(guī)律。 ④在兩端橋臺(tái)上設(shè)置鉛芯橡膠減震支座，運(yùn)用非線性時(shí)程分析法，通過(guò)對(duì)結(jié)構(gòu)減震前和減震后支座處截面內(nèi)力對(duì)比，了解到通過(guò)安裝減震支座，支座處截面在地震荷載作用時(shí)受力更合理。
[Abstract]:In this paper, the finite element model of continuous rigid frame bridge with asymmetric high pier and long span is established by using the large structure analysis software Midas/Civil, and the seismic response of the structure is studied. The main contents of my research are as follows: 1 the finite element model of long-span continuous rigid frame bridge with high piers and long span is established by Midas/Civil, and the eigenvalue analysis is carried out, and the natural frequency, period and mode shape of the bridge are obtained. And the characteristics of its natural vibration are analyzed. 2 the response spectrum method and time-history analysis method are used to analyze the seismic response of the structure under different seismic load conditions, and the structure is subjected to the same load condition. The analysis results of critical section response spectrum method and time history analysis method are compared, and how to select the seismic calculation method effectively in seismic design of the bridge is obtained. 3. Four models of different pier heights are established. The response spectrum method is used to analyze the seismic response of the structure under different load conditions. Through the internal force value of the key section, the law of internal force distribution is studied. By using nonlinear time history analysis method, by comparing the internal forces of the bearing sections before and after the shock absorption, it is found that the section of the bearing is more reasonable when the seismic load is applied through the installation of the shock absorber support.
【學(xué)位授予單位】：重慶大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：U448.23;U442.55

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